What is a slot machine trigger number?
It is the point where a machine's accumulated state — a progressive counter, a collection meter, a persistent feature — has risen high enough that the expected return crosses break-even. Below the number, the house still has the edge and you keep walking. At or above it, the math favors the player.
How do you use a trigger number on the floor?
Read the machine's visible counter, compare it to the trigger number from its guide, and only sit if the counter meets or beats it. You are not betting to find out — you are shopping for a machine an earlier player already pushed close to its ceiling and then abandoned.
How do you find the break-even point on a must-hit-by progressive?
For a must-hit-by progressive, the counter must pay before a printed cap, so the closer it is to that cap, the better the expected value. The [Must-Hit-By calculator](/calculators/mhb) does the math in seconds: enter the current counter and cap to see whether the play clears break-even.
When should you walk away?
The moment the counter hits, or if it drops below its play number, the edge is gone — leave and find the next one. Read exact triggers and walk-away rules in the [guide library](/guides), or learn the fundamentals in the [Learn hub](/learn).